HiRISE | A Light Toned Deposit in Arsinoes Chaos (ESP_037545

NASA/JPL-Caltech/UArizona

A Light Toned Deposit in Arsinoes Chaos
ESP_037545_1730 Science Theme: Geologic Contacts/Stratigraphy

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The objective of this observation is to examine a light-toned deposit in a region of what is called “chaotic terrain” at the base of the Valles Marineris canyon system.

The deposit displays a rough surface, in contrast to the smoothness of the surrounding area. Some parts of the surface appear as if they were eroded by a fluid flowing north and south, or perhaps sculpted by the wind. This area is also visible in a Context Camera image (P04_002747_1736). This deposit may be related to interior layered deposits in the Valles Marineris where it’s been suggested to have formed in an ancient lake.

This caption is based on the original science rationale.

Written by: HiRISE Science Team (narration: Tre Gibbs) (15 October 2014)

Acquisition date
31 July 2014

Local Mars time
15:45

Latitude (centered)
-7.034°

Longitude (East)
332.098°

Spacecraft altitude
268.3 km (166.7 miles)

Original image scale range
53.7 cm/pixel (with 2 x 2 binning) so objects ~161 cm across are resolved

Map projected scale
50 cm/pixel and North is up

Map projection
Equirectangular

Emission angle
2.5°

Phase angle
59.8°

Solar incidence angle
57°, with the Sun about 33° above the horizon

Solar longitude
170.2°, Northern Summer

For non-map projected images
North azimuth: 97°
Sub-solar azimuth: 15.7°

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USAGE POLICY
All of the images produced by HiRISE and accessible on this site are within the public domain: there are no restrictions on their usage by anyone in the public, including news or science organizations. We do ask for a credit line where possible:
NASA/JPL-Caltech/UArizona

POSTSCRIPT
NASA’s Jet Propulsion Laboratory, a division of the California Institute of Technology in Pasadena, Calif., manages the Mars Reconnaissance Orbiter for NASA’s Science Mission Directorate, Washington. The HiRISE camera was built by Ball Aerospace and Technology Corporation and is operated by the University of Arizona.